code: def search(self, doc: Doc, threshold: int | float = 0) -> list[int]:
      pass
  
file_path: dedupe/dedupe/index.py
imports: from __future__ import annotations
  from abc import ABC, abstractmethod
  from typing import TYPE_CHECKING
label_desc: Use image node_id 4 for calling the Index obj's underlying member method code with example usage: obj.search(doc, threshold) without return types